Rolex Beta 21 Il Texano Cream dial in 18k yellow gold ref 5100While Rolex is celebrated for its legendary references and groundbreaking innovations that have defined modern watchmaking, there exist a few rare models known only to the most discerning collectors. Among them is the enigmatic Rolex 5100. Produced in very limited numbers between 1970 and 1972, the 5100 holds a special place in Rolex history as the brands first ever quartz timepiece, arriving seven years before the better known Oysterquartz. Even